A.≤8g/kg B.≤7g/kg C.≤6g/kg D.≤5g/kg
A.≤100g/L B.≤150g/L C.≤200g/L D.≤250g/L
A.≤1.6mg/L B.≤1.5mg/L C.≤1.3mg/L D.≤1.0mg/L